goto 0.5.1
add doc !
add doc ! update UI text
Merge branch 'master' into dev

Conflicts:
	README.rst
Merge branch 'master' into dev
Merge branch 'master' into dev
Merge branch 'master' into dev
begin grapher refactoring
Merge branch 'master' into dev
add grapher utils and color schemes
Simplify Analyzer Results implementation by introducing a Factory and multiple classes and subclasses to handle the 8 different kinds of results
Fix some assignment issues regarding immutable type in for Analyzer Result
Fix doc in tutorial and enable testsetup and testcleanup to support transparent uses of external ressources in doctest
Fix test_AnalyzerResult.py to support the new analyzer result refactoring from SHA: 58b040a5f67d59c2b9fb55dbc67b723fbce4e51b
Change function AnalyzerResultFactory to lowercase analyzer_result_factory
remove self returning from pipe.run(), cleanup
refactor and simplify the grapher processor system, add Grapher abstract generic class
add WaveformTransparent grapher, optimize and cleanup Spectrogram
add decoder.utils, fix some api test names
cleanup, add a SpectrogramLinear grapher